A more thorough explanation:

An imperfect grant is a type of agreement that creates a right for someone other than the person who made the agreement. This can include things like leases, easements, charges, patents, franchises, powers, and licenses. It can also refer to the formal transfer of real property through a deed.

There are different types of grants, such as community grants, which are grants of real property made by a government for communal use, and private grants, which are grants made to an individual for their private use. An imperfect grant is one that requires the grantor to do something before the title passes to another, or one that does not convey all rights and complete title against both private persons and government.

For example, if a government grants a piece of land to a community for use as a park, but specifies that the community must maintain the park and keep it open to the public, this would be an imperfect grant. The grantor has not fully transferred all rights and title to the land, as they still have some control over how it is used.

Another example of an imperfect grant is if someone grants a lease on a property, but specifies that the lease is only valid if the lessee makes certain improvements to the property within a certain timeframe. Until those improvements are made, the grantor still has some control over the property and the lease is not complete.